i have a question that many MP3 songs have higher sound than others .why its So???....n can i increase the sound of songs...if its Possible

n my next question is abt Software ...can u tell me abt any software which produce all the combination of alphabets into Words. For Example if i entered

National in dis order LNAITNAO......it will produce all the words in the result which contain dese alphabets

Kindly tell me if nay 1 know .Thankx in advance